Examples:

If a solution has a pH of 4, what is the [H+]?Since we know the pH, we can use the formula [H+] = 2nd log (pH) Plug in the known information: [H+] = 2nd log (-4) Solve the equation on a graphing calculator: [H+] =.0001 or 1 E-4

If a solution has a pOH of 9, what is the [H+]?Since we know the pOH, we can use the formula pH + pOH = 14Plug in the known information: pH + 9 = 14 Solve the equation: pH = 5 We can then use another equation to help solve for [H+]: [H+] = 2nd log (-pH) Plug in the known information: [H+] = 2nd log (-5)Solve the equation on a graphing calculator: [H+] = .00001 or 1 E-5

If a solution has [OH-] = 3 E-3, what is the pH?Since we know the [OH-], we can use the formula pOH = -log [OH-] Plug in the known information: pOH = -log [3 E-3]Solve the equation on a graphing calculator: pOH = 2.5We can then use another equation to help solve for pH: pH + pOH = 14 Plug in the known information: 2.5 + pH = 14Solve the equation: pH = 11.5

Older Concepts:

Review as necessary

What is a Conjugate?

Conjugate Acid: Created when a base gains an H+ ion
Conjugate Base: Created when an acid gains an OH- ionIn an acid-base reaction, the following equation is used:Acid + Base = Conjugate Acid + Conjugate Base

December 10-14, 2018

December 3-6, 2018

Continue to work on the “Unit 3Quiz#1″ Vocabulary Quiz”

Make Picture notes of the following terms:

Saturated solution

Solubility

Molar Solubility

Dissolving/Crystallization

Ionic and Molecular Solutions

Note that the molar concentration (indicated by square brackets) of the solid compound is not included in the final solubility product expression. This is because the solid molar concentration is constant and therefore is assigned a value of “1”. The expression obtained for molar solubility shows a simple exponential relationship between the solubility product constant and molar solubility!

Thursday, October 4, 2018: Unit 1 Kinetics Quiz #1 – Be able to list the 6 ways to monitor reaction rates; be able to write the 6 rate equations for each method; be able to select a species to monitor for a change in the sample equations.

September 2018

Week 4: September 24-28, 2018

Hebden Homework Set 3

Week 3: September 17-20, 2018

Lab: “Factors affecting reaction rates”

Please complete Hebden Set #2 “Factors that affect Reaction Rates”

Please continue to review for the “Review Test of Junior Chemistry Concepts”

***To more effectively show that that rate increases with increasing concentration (Molarity) a graph of concentration versus reciprocal seconds was plotted and a best fit line was drawn. The rate/speed of the reaction was observed to increase with increased concentration.

The rate/speed of a reaction is proportional to the concentration of a particular reactant. This is due to the fact that chance collisions forming products are proportional to the concentration.

Collision theory predicts that when more particles (reactants) are involved in successful collisions the rate of the reaction will increase. The units of moles/litres/1/s shows that when solution concentration increases the reaction rate increases.

Sources of Error: At decreased concentration it was difficult to observe the exact time that the pigment had changed. Therefore, at lower concentrations the time reported for the reaction to go to completion was greater that it should have been. More than one timing devicewas used for the different lab groups. Because of this difference the time was not recorded in exactly the same manner. Different lab groups used larger test tubes. The optical quality of the larger test tubes might differ and therefore the reported time might differ.

September Homework – 2017

September 11-15, 2017

September 5-8, 2017

Do you have the following school supplies?

pencil and eraser

NON-graphing calculator

If yes – all good

If no – time to go shopping.

June Homework – 2017

Wednesday June 7, 2017

Battery Presentation due X/16

To get full marks make sure to explain what the 1) anode is, for example what is it made of; 2) what the cathode is and what it is make of; 3) the electrolyte (how it works); and 4) the electron flow to make electricity.

Monday June 5, 2017

Please use the iPad app “Explain Everything” to explain how batteries work.

The sign-up sheet is available in class – sign-up begin on Friday May 25, 2017.

Please complete the Unit #3 Solubility Quizzes and Checkpoints as part of the study and review school work for the Final Exam. Extra Copies are available in class in the Chemistry 12 Extra Copies Binder.

Monday May 8, 2017

Review #1: Please pick-up the two review hand-outs on Equilibrium and Solubility/complete the practice questions.

Learn more about the abstract nature of learning math and science – remember study early and study often

January Homework – 2017

January 27, 2017

The successful student will be able to label acids and bases as well as their conjugates.

The successful student will be able to identify the strong acids and calculate their pH

January 19, 2017

How are strong acids different from weak acids?

January 17, 2017

Be able to identify the conjugate acid and base pairs using the Bronsted-Lowry Definition of Acids and Bases: Homework sets #22, #23 and #24 are Due.

January 10, 2017

Unit 4 – Acids and Bases

Complete Work sheet 4.1

January 3, 2017

Welcome back and Happy New Year!

Lab 12D Part III – Chloride Ion Concentration – Open lab Quiz on Thursday January 5, 2017. Please be able to explain the process of titration using Lab 12D Part III as a specific case study. Be able to explain the role of the indicator.

December Homework – 2016

December 12, 2016

Lab 12D Part III only the Chloride Ion Concentration in a sample of water. Please complete the lab using your formal lab report procedures

The rate/speed of a reaction is proportional to the concentration of a particular reactant. This is due to chance collisions forming products being proportional to the concentration. Collision theory predicts that when more particles (reactants) are involved in successful collisions the rate of the reaction will increase. The units of moles/litres/1/s shows that when solution concentration increases the reaction rate increases.

Sources of Error: At decreased concentration it was difficult to observe the exact time that the pigment had changed. Therefore at lower concentrations the time reported for the reaction to go to completion was greater that it should have been. More than one timing device was used between the different lab groups. Because of this difference the time was not recorded in exactly the same manner. Different lab groups used larger test tubes. The optical quality of the larger test tubes might differ and therefore the reported time might differ.

September 16, 2016

Lab – Iodine Clock Reaction -(Part 1)

September – school supplies

You will need a non-graphing scientific calculator.

binder to hold class notes and handouts

Hebden Chemistry 12 – Student workbook

June Homework – 2016

June 13, 2016

Lab 13D Hydrolysis is Due

Acid Precipitation – single page information poster is due

June 7, 2016

Library Research Day

Complete the Hydrolysis Lab – finish all of the lab questions (the lab is due on Monday June 13, 2016).

Complete the Acid Deposition Assignment – due Monday June 13, 2016.

Select a question that relates to how acid deposition (acid rain) effects the environment in Canada. Please use a specific biotic or abiotic item as a case study to highlight how acid deposition is affecting the well-being of this item.

For example: 1) how is soil health effected by acid rain? In BC agricultural soils are classified using a scale.

April 15, 2016

Final Exam: Monday May 30, 2016

Please note the date of the Chemistry 12 Final Exam. The Exam is comprehensive and will cover all of the class material up to the date of the exam. Please use the links on the Final Exam Page to start to review material for the exam.

Prepare a presentation on battery power (sign-up available in class). Explain how the battery works, special features of the battery, and why the battery is unique (historical significance/technological significance). Outline the strengths and faults associated with the battery.

Complete Lab 14A “Oxidation-Reduction Reactions of Elements and their Ions” Page 230 in Essential Experiments for Chemistry. Make sure that you answer all of the questions in the “Analysis of Results” Section as well as all of the “Follow-up” Questions. Write a conclusion that states whether halogens are generally oxidizing agents (chemicals that make oxidization happen) or reducing agents. Make sure that you make a comment on the periodic trent you observed. This means that are the halogens at the top of the family better at oxidizing verses those near the bottom of the family. Consider what you learned in Chemistry 11 wrt to trends in reactivity to help you to respond to this question.

Lab 14A is due on Tues. Oct. 27th, 2015.

Study for a quiz on titrations – what is a titration (Lab technique) and how do you use titration data to calculate the concentration of an unknown sample.

Titration quiz is on Thursday October 29th, 2015.

October 1, 2015

Complete homework sets #36 and #37

Be able to identify the parts of the standard redox chart

Study for the Unit 5 quiz on redox terms and be able to identify the part of an electron transfer reaction

Plants grow and survive by absorbing dissolved nutrients and micronutrients from the soil. When the soil solution is either too acidic or too basic some of the nutrients do not dissolve as readily as they should (the solubility is decreased).

The nutrients that plants need for growth dissolve most readily when the pH of the soil is between 6.o and 7.5. If the soil solution falls below 6.0 nutrients such as nitrogen, phosphorus and potassium are less available. If the pH is larger than 7.5 nutrients such as iron, manganese and phosphorus are less available.

Spring Break runs from March 17th, 2014 until March 28th, 2014. Please use any study time to review Unit 3 Solubility.

Tuesday March 11, 2014

Complete Lab 12D and Study for the Solubility Quiz- (Sections 7 and 8)

Sign up to write the CHEM 13 NEWS Chemistry Exam – this is an excellent way to prepare for the Chemistry 12 Final Exam. Deadline is Monday March 31, 2014

Note that the Unit 3 Solubility Test has been scheduled for Monday April 7th, 2014. Use some of your Spring Break time to review for the test.

Note that the molar concentration (indicated by square brackets) of the solid compound is not included in the final solubility product expression. This is because the solid molar concentration is constant and therefore is assigned a value of “1”. The expression obtained for molar solubility shows a simple exponential relationship between the solubility product constant and molar solubility!